Gauge



May 18, 1954 L. R. PlSTOLE-S GAUGE 2 Sheets-Sheet 2 Filed NOV. 50, 1948INVENTDE LAMBERT R. PISTIJLES ATT CIRNEY Patented May 18, 1954 um'reosures e GAUGE.

Lambert Pistoles, Wilmington l elj... Application Nbvemli'er so, 1948,Serial 625 788 (on. sci-472) 9 Glaims;

This invention relatesto pin gages, and more particularly to gagesoperatingthrou'gh a dial.

It-is a further object of the invention-to pro-- 1 vide a gageof thecharactendescribed,- which shall be rugged and adapted to reliablyretain-a setting.

A still further object of the invention isto provide a pin gage withdial indicator whieh ma'y be easily set, economical to manufacture; andot a construction affordingmaximum protection to: the gage.

The above and other novel features of the invention will appear morefullyhereinafter irom the following detaileddescription-when taken inconjunction with the accompanying" drawings;- Itis expresslyunderstood'that the drawings a-re employed for purposes of 1illustration only and are not designed as-a definition of the limits ofthe-invention; reference -beinghad for this pu-rpose to the appendedclaims.

ln the drawings, wherein like referencechar1-v acters indicate likeparts:

Figure 1 isairontelevation ofthepimgage; with dial indicator mountedthereon; 1

t Figure Z-is a-vertical transverse sectiontaken substantially on theline 2--2 of Figure. '1; t

Figure 3 is a vertical section takensubstantially on the broken line3-3-of-Figure 2;

Figure 4 is a transverse section takenon the? lined-4 of Figure 3;

Figure 5 is an alternative sectional'detail;

Figure-6 is a front elevation partly in section;-

of a modified formof theinvention;

Figure '7 is an enlargedtransverse*sectiontaken on the line T-TofFigure6; and t Figure 8" is a-front elevation of thet gage provided with aspherical segment. work con-tact member.

In Figures. 1 to 4; inclusive, thereis shown-a gage comprising a frame l0 having an arm- 12. having aplane-gaging surface It; and a: bodyportion 16- in which th'ere is mounted a gage pin on indicating rod 18%desired position-z in; the bore: 261*. by ff-r vided-;with;;a bore 20,";innv together. a; concentrie.- boner 2611 0121, the pin- It. Eachofsthahalfzsleevesgis proyidedwitha sem annular. gIOOYGi' 21-;- andr 28which coast :Wi 1

split ring. 30 .positionejd; (-81.100553? 32 in th pin |8,.andaare-adapted to: be -clamped: 1.

any-

. IS clamp; members. s3! randy 35 z wedg zng; against; the, half 5sleeves: While; any; desired: clamping arrangement :may be employed;reference- .is s ade to thescopending, applications afioresaid; for.vspe-- cific detailstof preienredtformsa. The; half sleeve maybeclamped,in: opposition, or. staggered relatiortifo: rovide a-limited-movement o.1 the Dina l8; the; moyementtsomewhat"excee in the olen ance. range inneither directionrfor; whi h the a e i is to be set, as will hereinaftermore particularly appear;

Rigidly secured itosbodyz portion 16- by screws 38 is a-. gage,supporting and: housing bracket, having a hollow shanktdmwith; bore ll,and dial indicator:receivingrecess 42.- The, dial indicator receivingrecess is somewhatelongated to permit positioning oftheiind-icator insetting "the gage as will hereinafter appear: The upper end or throatportion-.45.=of the shankiss provided with split H clamping .memberw M,the bracket and clamping member being. pn'ov'idedw with semi-cylindricalseatsAB: and-'ldilzadapt'ed to fit aboutand securely clampthe-"shankitifl iOf"; ardiaI indicator 52. The clamping member; 4.451ssecured... to. the bracket byclamp screws'fl andlt'afirarrangeclinopposite.

sides and threaded in the bracket. The cylin drical seat 46. issuitably.v aligned with respect to the boreslflt so aSAtOWhOId'EthG.dial inolicator- 52; with its indicating. spindle 53.1111 axialalignment with the-gage pin I81:

The. upper end-of the'sgage frameadjacent the, oppositeside of the: dialindicator. recess from the shank; is provided' with a boss fifi; havinga bore '5 l therethrouglr in axial alignment .with' the gage pinWithimsuch bore is provided a slidableadapterpl-iig 58- having ashoulder. and threadedend 62 adapted to be received in the threadedaperture. 643. in the wall of the dial indicator. Itawill be understoodthat dial indicators-are provided. with a dust can; or extension memberwhich. may be": removed; toj receive the adapter plug 58..

The adapter: plug till: is. axiallyw bored: and threaded as at 6:1 toreceivea iflat rheadtadj usting slidable onanaxis normal screw 53;theeunderiaee woof; thezhead being The dial indicator.

the frame, the dial indicator having the desired range inserted in therecess, and thereafter fitted with the adapter plug 58, the latter beingscrewed securely in place, a screw driver. slot ll) being formed in theopposite end to facilitate the operation. A suitable length end pointlZis applied to the indicator spindle. Thereafter, the clamp member 44 islightly placed in position, and the end adjusting screw 63 inserted inthe adapter plug. With the gage pin and surface hi in contact withsurfaces of a standard work piece of the type to be gaged, the dialindicator is moved axially in the recess by manipulating the screw 63until the indicator hand thereof indicates zero, whereupon the clampmember 44 is drawn tightly around the dial indicator shank by tighteningthe screws 54 and 56. The gage is thus properly set for gagingoperations.

In practice, the heads of screws 54 and 56 and B3 are sufiioientlyrecessed to provide space for a sealing compound such as beeswax, and anindicia strip M bearing the gate setting may be applied over the sleeveclamping members 35 and 355. Where the dial indicator vis provided witha projecting male thread for reception of a suitable dust cap, theadapter plug will be provided with a suitable complementary femalethread, a plug '16 of this type being illustrated in Figure 5. i

In the modified form of Figure 6, the gage pin H8 is slidably secureddirectly in a bore. KM, and the body portion Ht of the frame H6 isprovided with an axially aligned recess I22 having an annular shoulder124 at the base thereof. The gage pin H8 is provided with a threadedshank lid upon which is threaded a collar [25 having an annular shoulder428 on one end, and a plane face lie at the other.' The dial indicatorbracket is the same as that shown in Figures 1 to 4, and is providedwith a hardened ring Hill,

adapted to engage the shoulder 924 of the collar. A light coil biasingspring H2 is positioned within the hollow shank, thesame bearing uponthe collar I26 and the shoulder it formed by. the

split clamp.

In order to securely hold the collar upon the threaded shank, at anydesired setting, a set screw sec, in the form of a socket head screw isthreaded radially in the collar, and bears against a brass plug Hit,adapted to bear against and be deformed by the preferably hardenedthread of the shank i265 ofthe pin H8.

In practice, collars, of varying axial length between the annularshoulder I28 and the face I29, so as to provide for differing axial movement of the pin will be supplied. The movement to be allowed will besufficientto more thanembrace the tolerance range to be indicated, butpreferably less than'that whichwould permit rotation of the indicatorasmuch'as'180"v in either direction from the zero position. Thus, thecollar length will in practice be chosen to match the dial indicatorcharacteristics. .Also, pins of varying length will beavailable toprovide a com plete range, so that the gage may be set for anydimension.

As previously, the dial indicator will be adjusted in its recess, and aproper length end point 52 selected so that the indicator willindicatezero when the gage pin and frame are in engagement with the surfaces tobe gaged of a standard work piece.

The gage frame may be of T formation as shown in Figure .8, and the pinfitted with any suitable contacting member such as the segment Hi2having a spherical face M4. The segment may be keyed from rotation by apin Hit adapted toproject freely through a, suitably located aperture inthe face of the gage face Hit.

It will be seen that a rugged pin type gage for use with a dialindicator is provided, which may be set in a manner such as to preventunauthorized tampering, without danger of rough treatment disturbing thesetting. Likewise, the dial indicator is afforded complete protection,and is readily held in position where set, or readily removed for use inother situations, With a frame member, and dial indicator bracket, and aset of pins of different lengths and a set of dial indicator end points,a setting for any dimension may be had.

While the invention has been illustrated and described in several forms,it is to be understood that the invention is not limited thereto. Asvariations in use and operation and changes in construction andoperation may be made without departing from the spirit of theinvention, as Will be apparent to those skilled in the art,refereneewill be had to the appended claims for a definition of thelimits of the invention.

What is claimed is:

1. In a pin gage, a frame, a gaging surface thereon, a gage pin slidablein said frame normal to said surface, a bracket having a recess for adial indicator rigidly secured to said frame, means on said bracket forsecuring a dial indicator with its indicator rod in alignment with saidgage pin, means for limiting movement of said gage pin to a range ofmovement embracing a desired gage dimension and desired tolerances, anda dial indicator held in said bracket by-said securing means, and meansin axial alignment with the rod and gage pin for moving said dialindicator axially within its holding bracket and with respect to saidgage pin with its indicator rod in contacting relation to an end of saidgage pin, to secure a zero reading thereof upon the gage pin assumingsaid desired gage dimension. I

2. In a pin gage, a frame, a gaging surface thereon, a gage pin slidablein said frame normal to said surface, a bracket secured rigidly to saidframe, said bracket having means to mount a dial indicator with itsindicator rod in alignment with said gage pin, a dial indicator mountedon said bracket, and means in axial alignment with the rod and gage pinon said bracket for bodily moving said dial indicator axially relativeto said bracket and with respect to said pin.

I said bracket having means to mount a dial indicator with its indicatorrod in alignment with said gage pin, a dial indicator mounted onsaidbracket, meansin axial alignment with the rod and gage pinon saidbracket for bodily moving said dial indicator axially. with respect: to.said.

bracket and pin, and means for rigidly securing said dial indicatoragainst axial movement upon positioning said indicator in a desiredindicating position.

4. In a pin gage, a bracket for mounting a dial indicator of the typehaving a body portion provided with a shank and indicating rodprojecting from one side of said body portion, and a threaded securingmeans oppositely disposed on said body portion aligned with the shankand rod, said bracket having a clamp for the shank of the dialindicator, said bracket also having an axially reciprocal adapter memberhaving complemental securing means axially aligned with said shank clampand spaced therefrom sufficiently to more than receive the body portionof the dial indicator and adapted to engage the said threaded securingmeans of said gage, and means for gradually moving said adapter member.

5. In a pin gage, a bracket for mounting a,

dial indicator, said bracket having an elongated circular recess forreceiving and protecting a dial indicator, said bracket having a dialindicator shank clamping means located at one end of said elongatedrecess, and a core at the other end of said recess aligned with saidclamping means, a shoulder in the outer end of said bore, an adapter forattachment to a dial indicator reciprocal in said bore, and screwthreaded means axially threaded in said adapter, and engaging saidshoulder, for moving said adapter in said here.

6. In a pin gage, a frame, a gage pin slidable therein, a recess in saidframe coaxial of said pin, a threaded shank on said pin, a collarthreaded on said pin located in said recess, a dial indicator brackethaving means for securing a dial indicator in alignment with said pin,said bracket partially covering said recess and coacting with an end ofsaid collar to limit movement of said collar and gage pin, and resilientmeans bearing in an axial direction against said collar for biasing saidgage pin away from said bracket.

'7. In a dial indicator supporting device, a bracket having formedtherein a recess for receiving a dial indicator, substantially alignedbores entering said recess from opposite sides thereof, one of saidbores being reduced adjacent the recess and provided with clampingmeans, an adapter plug slidably positioned in the other bore and meansfor moving the plug axially of the bore, said recess being elongated inthe direction of the axis of said bores to permit movement of a circulardial indicator contained in said recess in the direction of the axis ofsaid bores.

8. In a pin gage, a frame having a gaging surface thereon, and a gagepin aperture extending normal thereto, a gage pin slidable in saidaperture and having a threaded shank within said bore, said bore beingenlarged to provide a recess and shoulcer, a collar threaded on saidshank, transverse means in said collar for locking said collar in aselected position on said shank, and a dial indicator bracket secured tosaid frame and covering said recess, and having a bore aligned with saidaperture and forming an opposed shoulder for said recess, said collarhaving an axial length less than the axial spacing between saidshoulders.

9. In a pin gage, a frame having a gaging surface thereon, and a gagepin aperture extending normal thereto, a gage pin slidable in saidaperture and having a threaded shank within said bore, said bore beingenlarged to provide a recess and shoulder, a collar threaded on saidshank, transverse means in said collar for locking said collar in aselected position on said shank, a dial indicator bracket secured tosaid frame and covering. said recess, and having a bore aligned withsaid aperture and forming an opposed shoulder for said recess, saidcollar having an axial length less than the axial spacing between saidshoulders, and resilient means in said bore bearing against said collarto bias said pm.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,160,630 MacKinnon Nov. 16, 1915 1,290,434 Walter Jan. 7,1919 1,854,346 Ostlind. Apr. 19, 1932 2,052,153 Willis Aug. 25, 19362,253,803 Newberry Aug. 26, 1941 2,445,875 Emery July 27, 1948 FOREIGNPATENTS Number Country Date 339,507 Germany Dec. 21, 1919

